Rechargeable magnesium batteries (RMBs) have been considered a promising “post lithium-ion battery” system to meet the rapidly increasing demand of the emerging electric vehicle and grid energy storage market. However, the sluggish diffusion kinetics of bivalent Mg²⁺ in the host material, related to the strong Coulomb effect between Mg²⁺ and host anion lattices, hinders their further development toward practical applications. Defect engineering, regarded as an effective strategy to break through the slow migration puzzle, has been validated in various cathode materials for RMBs. In this review, we first thoroughly understand the intrinsic mechanism of Mg²⁺ diffusion in cathode materials, from which the key factors affecting ion diffusion are further presented. Then, the positive effects of purposely introduced defects, including vacancy and doping, and the corresponding strategies for introducing various defects are discussed. The applications of defect engineering in cathode materials for RMBs with advanced electrochemical properties are also summarized. Finally, the existing challenges and future perspectives of defect engineering in cathode materials for the overall high-performance RMBs are described.

Led by Drs. Mijeong Han and Young Hun Kang at the Korea Research Institute of Chemical Technology (KRICT), the team combined carbon nanotubes with Bi₀.₄₅Sb₁.₅₅Te₃ (BST) in a porous foam structure to maximize thermoelectric performance.

A research team from the School of Biomedical Sciences, LKS Faculty of Medicine at the University of Hong Kong (HKUMed), in collaboration with Queen Mary University of London and the Max Planck Institute for Terrestrial Microbiology, has unearthed the ancient evolutionary origins of genes critical to stem cell biology, dating back over 700 million years. Drawing on insights from evolutionary processes, this discovery reveals that tools borrowed from ancient single-celled organisms—and even recreated proteins from life’s earliest days—can transform mouse somatic cells into pluripotent stem cells capable of developing into any cell type in multicellular animals. This breakthrough challenges the longstanding belief that only animal genes possess this transformative ability, paving the way for new protein designs in novel therapies for regenerative medicine and disease studies to combat ageing and related health issues. The findings were recently published in Nature Communications.